A TREATISE 



ON THE 



THEORY OF SCREWS 



SIR ROBERT STAWELL BALL, LL.D., F.R.S., 



LOWNDEAN PEOFESSOE OF ASTEONOMY AND GEOMETEY IN THE 



TTNIVEESITY OF CAMBEIDGE, 

 FOEMEELY EOYAL ASTEONOMEE OF IEELAND. 



CAMBRIDGE: 

 AT THE UNIVERSITY PRESS. 



1900 



[All Rights resented.] 



